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Antimicrobial Agents and Chemotherapy, July 2007, p. 2611-2614, Vol. 51, No. 7
0066-4804/07/$08.00+0 doi:10.1128/AAC.00838-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
Characterization of an Integron Carrying blaIMP-1 and a New Aminoglycoside Resistance Gene, aac(6')-31, and Its Dissemination among Genetically Unrelated Clinical Isolates in a Brazilian Hospital
Rodrigo E. Mendes,1*
Mariana Castanheira,1
Mark A. Toleman,2
Helio S. Sader,1,3
Ronald N. Jones,3,4 and
Timothy R. Walsh2
Laboratório Especial de Microbiologia Clínica and Laboratório ALERTA, Division of Infectious Disease, Federal University of São Paulo, São Paulo, Brazil,1
Department of Pathology and Microbiology, University of Bristol, Bristol, United Kingdom,2
JMI Laboratories, North Liberty, Iowa,3
Tufts University School of Medicine, Boston, Massachusetts4
Received 10 July 2006/
Returned for modification 14 October 2006/
Accepted 19 April 2007
Seven blaIMP-1-harboring Acinetobacter sp. isolates and one Pseudomonas putida clinical isolate were recovered from hospitalized patients. All isolates possessed a class 1 integron, named In86, carrying the same cassette array [blaIMP1, aac(6')-31, and aadA1], which was plasmid located in five of the isolates. This report describes the ability of nonfermentative nosocomial pathogens to acquire and disseminate antimicrobial resistance determinants.
* Corresponding author. Mailing address: Special Clinical Microbiology Laboratory, Division of Infectious Diseases, Federal University of São Paulo, Rua Leandro Dupret 188, São Paulo CEP 04025-010, Brazil. Phone: (55-11) 5081-2819. Fax: (55-11) 5571-5180. E-mail:
rodrigo.mendes{at}lemc.com.br
Published ahead of print on 30 April 2007.
Antimicrobial Agents and Chemotherapy, July 2007, p. 2611-2614, Vol. 51, No. 7
0066-4804/07/$08.00+0 doi:10.1128/AAC.00838-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
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